[Bug 220284] USB4 / Thunderbolt not working after boot until thunderbolt module is reloaded

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=220284

--- Comment #1 from Alyssa Ross (hi@alyssa.is) ---
On Fri, Jun 27, 2025 at 05:29:56PM +0000, bugzilla-daemon@kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=220284
>
>             Bug ID: 220284
>            Summary: USB4 / Thunderbolt not working after boot until
>                     thunderbolt module is reloaded
>            Product: Drivers
>            Version: 2.5
>     Kernel Version: 6.15.3
>           Hardware: AMD
>                 OS: Linux
>             Status: NEW
>           Severity: normal
>           Priority: P3
>          Component: USB
>           Assignee: drivers_usb@kernel-bugs.kernel.org
>           Reporter: kim.lindberger@gmail.com
>         Regression: Yes
>
> Laptop: Lenovo ThinkPad T14s Gen 4, model 21F8CTO1WW (AMD)
>
>
> When upgrading from 6.15.2 to 6.15.3 my ThinkPad Thunderbolt 4 Dock stopped
> working, giving basically no signs of life even when unplugged and replugged.
> It doesn't start working again until the thunderbolt module is unloaded and
> reloaded while the dock is still connected. If I unload and reload while the
> dock is disconnected, nothing happens.
>
> When booting, I can also see
>
> thunderbolt 0000:c5:00.6: probe with driver thunderbolt failed with error
> -110
>
> in the log, which wasn't printed with prior kernels.
>
> I don't boot with the dock connected.
>
> The issue persist with 6.15.4.

#regzbot introduced v6.15.2..v6.15.3 ^
#regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=220284
#regzbot link: https://github.com/NixOS/nixpkgs/issues/420730
#regzbot title USB4 / Thunderbolt not working after boot until thunderbolt
module is reloaded

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